Contract Law

State of West Bengal v. B.K. Mondal & Sons

AIR 1962 SC 779

Facts

B.K. Mondal & Sons carried out construction work for the Government of West Bengal.
The work included structures required by the Civil Supplies Department.
Government officers requested and supervised the work, and the completed structures were used by the Government.
However, the agreement did not comply with the mandatory constitutional formalities governing government contracts.
It was therefore not enforceable as a valid contractual agreement against the State.
The contractor nevertheless claimed payment for the work and materials supplied.
The State argued that because there was no valid government contract, no contractual payment could be recovered.

Whether compensation could be recovered from the Government under Section 70 of the Indian Contract Act even though the formal contract was invalid.
Whether the Government had lawfully enjoyed a non-gratuitous benefit supplied by the contractor.

Section 70 applies where:
a person lawfully does something for another or delivers something to another;
the act is not intended to be gratuitous; and
the other person enjoys the benefit.
Liability under Section 70 is not based upon an enforceable contract.
It is a quasi-contractual or restitutionary obligation imposed to prevent unjust enrichment.
The claimant must prove lawful performance, non-gratuitous intention and actual enjoyment of the benefit.

Although the government contract was formally defective, the construction work itself was not unlawful.
The contractor had not built the structures as a gift.
The circumstances clearly showed an expectation of payment.
Government officials knew that the work was being performed and permitted it to continue.
The Government thereafter occupied, used and retained the structures.
It therefore received the practical benefit of the contractor’s labour and materials.
The Court distinguished:
enforcing an invalid contract; and
compensating a person for a benefit actually accepted.
Awarding compensation under Section 70 did not validate the defective government contract.
It merely prevented the Government from retaining valuable work without paying for it.
The appropriate amount was reasonable compensation for the benefit enjoyed, not automatically the precise price contained in the invalid agreement.

The Supreme Court held that the contractor was entitled to compensation under Section 70.
The invalidity of the formal contract did not permit the Government to enjoy the construction gratuitously.
Use this case for: Section 70 prevents unjust enrichment where lawful, non-gratuitous work is accepted even though no enforceable contract exists.